Select devices to monitor. Values refresh automatically.

Charts

No active brews. Start one.

Brew History

Start a New Brew

Brew Summary

Rating & Notes

Devices & Configuration change

Fermentation Chart

Temperature Profile

Brew Log

Legendary Brews

Your completed brews, rated and documented for posterity. Every great beer deserves a story.

Device Management

All devices that have ever connected to RAPT2MQTT. Customize names, add photos, or forget devices you no longer use.

No devices have been discovered yet. Start the bridge and connect a device.

What is a Tilt Hydrometer?

The Tilt is a wireless floating hydrometer that sits inside your fermenter and continuously measures specific gravity and temperature. No samples, no mess, no opening the fermenter.

How It Works

What You Need

Total cost to get started: ~$160 USD for the Tilt + Pi setup. You probably already have an SD card.

Why Not Just Use a Manual Hydrometer?

What About TiltPico?

Baron Brew also sells the TiltPico ($45 USD) — a WiFi-only bridge. It works, but it only speaks HTTP (no MQTT), only supports one Tilt at a time, and requires their cloud service for remote access.

A Raspberry Pi Zero WH ($17 USD) running TiltPi does everything the Pico does plus MQTT publishing, multi-Tilt support, and full local control — for less than half the price. We recommend the Pi.

Reviews & Reputation

The Tilt has been the go-to wireless hydrometer in the homebrewing community since 2015. It's used by thousands of homebrewers and small commercial breweries worldwide.

• Homebrew Academy: "The Tilt changed how I brew. I can't go back to manual readings."
• Brulosophy: "One of the most useful brewing gadgets available."
• Reddit r/homebrewing: Consistently recommended as the best gravity monitoring solution.

The Tilt is manufactured by Baron Brew Equipment LLC in the USA.

Next Step: Set Up TiltPi

Got your Tilt and Pi? Head to TiltPi Setup to flash the image, connect to MQTT, and start seeing live data in RAPT2MQTT.

What is RAPT?

RAPT (Real Ale Precision Technology) is a line of connected brewing equipment by Kegland, an Australian brewing supply company. The RAPT ecosystem gives you cloud-connected fermentation control with real-time monitoring from anywhere.

The RAPT Temperature Controller

The flagship product for fermentation. A WiFi-enabled temperature controller that manages heating and cooling in your fermentation fridge or chamber.

How It Connects

What You Need

The Wider RAPT Ecosystem

Kegland makes more than just the temperature controller. The RAPT platform includes:

• RAPT Pill: A wireless hydrometer (Kegland's competitor to the Tilt). Floats in your fermenter, reports gravity and temperature via the RAPT cloud.
• RAPT Portal: The web dashboard at rapt.io where you can monitor devices, view charts, set up brew profiles, and manage your API credentials.
• KegLand App: Mobile app for iOS and Android. Real-time device monitoring on the go.

RAPT2MQTT currently supports the Temperature Controller. RAPT Pill support may come in the future.

RAPT vs Other Controllers

Next Step: Configure RAPT2MQTT

Got your controller and API secret? Head to Settings to enter your credentials and start bridging data.

TiltPi Setup

Your TILT hydrometer floats inside the fermenter, silently broadcasting temperature and gravity over Bluetooth. But Bluetooth has a range of about 10 metres and no concept of WiFi, MQTT, or your network. Something needs to sit near the fermenter, hear those broadcasts, and relay the data to the rest of your system.

That something is a TiltPi -- a Raspberry Pi Zero WH running Node-RED, acting as a Bluetooth-to-WiFi bridge. It's the only piece of hardware between your TILT and RAPT2MQTT.

This page lets you find your TiltPi on the network, inspect what software it's running, and upgrade it with one click to unlock everything RAPT2MQTT needs.

Find Your TiltPi

RAPT2MQTT will scan your local network for any device running Node-RED on port 1880. If your TiltPi isn't found automatically, enter its IP address directly.

Tip: check your router's DHCP client list for a device called "tiltpi" if you don't know the IP.

Scanning network for TiltPi instances (Node-RED on port 1880)...

Found TiltPi Instances

No TiltPi instances found on the network. Make sure your TiltPi is powered on, connected to WiFi, and on the same network as this machine.

You can also enter the IP address manually if you know it. Check your router's DHCP client list for a device called "tiltpi".

TiltPi

About RAPT2MQTT

Version ...

RAPT2MQTT is an open-source bridge between Kegland RAPT brewing devices and MQTT, built for homebrewers who want real control over their fermentation.

This project was born from frustration with cloud-only brewery management. Your data should live on your network, in your Home Assistant, under your control.

What You Get -- Free

Built By a Homebrewer

This isn't a corporate product. It's one person, one fridge, one hydrometer, writing code between brew days. Every feature exists because I needed it for my own fermentation.

If you want an integration for gear I don't own -- I need to buy it, brew with it, understand it, and then write the code. That's where the community funding comes in.

Currently Supported

These devices work right now, out of the box.

Request an Integration

I don't own every piece of brewing gear on the market. To write an integration properly, I need to:

1. Buy the device -- hardware costs money
2. Brew with it -- understand how it actually works in a real fermentation
3. Reverse-engineer the API -- figure out the data format, protocols, and quirks
4. Write the integration -- and give it away to the community for free

If you want to see a specific device supported, fund it below. Once funded, it goes to the top of the build queue.

Create reusable temperature schedules and apply them to active brews.

New Profile

Home Assistant Setup

RAPT2MQTT can automatically create sensors in Home Assistant via MQTT discovery, or you can set them up manually.

Option 1: Auto-Discovery (Recommended)

Go to Settings and enable MQTT Auto-Discovery. Restart the bridge. Your devices will appear in Home Assistant automatically.

Requires the MQTT integration in Home Assistant with discovery enabled (the default).

What gets created:

• RAPT Controller: Fridge temperature, target temperature, cooling/heating status, signal strength, target temp slider
• Tilt Hydrometer: Beer temperature, specific gravity, signal strength

Forgetting a device in RAPT2MQTT automatically removes its sensors from Home Assistant.

Option 2: Manual MQTT Sensors

Add these to your Home Assistant configuration.yaml:

mqtt:
  sensor:
    - name: "Fermenter Temperature"
      state_topic: "RAPT/temperatureController"
      value_template: "{{ value_json.current_temp }}"
      unit_of_measurement: "°C"
      device_class: temperature

    - name: "Fermenter Target"
      state_topic: "RAPT/temperatureController"
      value_template: "{{ value_json.target_temp }}"
      unit_of_measurement: "°C"
      device_class: temperature

    - name: "Fermenter Mode"
      state_topic: "RAPT/temperatureController"
      value_template: >
        {% if value_json.cooling_active %}Cooling
        {% elif value_json.heating_active %}Heating
        {% else %}Idle{% endif %}

mqtt:
  sensor:
    - name: "Beer Temperature"
      state_topic: "rapt2mqtt/tilt-blue/state"
      value_template: "{{ value_json.temperature }}"
      unit_of_measurement: "°C"
      device_class: temperature

    - name: "Specific Gravity"
      state_topic: "rapt2mqtt/tilt-blue/state"
      value_template: "{{ value_json.specificGravity }}"
      unit_of_measurement: "SG"

Brew Notifications to Your Phone

Push brew events to your phone via Home Assistant.

automation:
  - alias: "HASS Notifications"
    trigger:
      - platform: mqtt
        topic: "homeassistant_notifications"
    action:
      - service: "notify.{{ trigger.payload_json.target_device }}"
        data:
          title: "{{ trigger.payload_json.title }}"
          message: "{{ trigger.payload_json.message }}"
          data:
            notification_icon: "{{ trigger.payload_json.icon }}"

Any service can publish to homeassistant_notifications — the target_device in the payload routes to the right phone.

Custom Template Sensors

Build custom sensors from the available data.

template:
  - sensor:
      - name: "Estimated ABV"
        state: >
          {{ ((states('sensor.original_gravity') | float -
             states('sensor.specific_gravity') | float) * 131.25) | round(1) }}
        unit_of_measurement: "%"
        icon: mdi:percent

Support This Project

Contribute to the project so I can keep coding more integrations without losing my buzz.

I set goals on Ko-fi for each new integration — hardware, ingredients, brew days. When a goal gets funded, it goes to the top of the build queue.

RAPT2MQTT

Bridge between RAPT (Kegland) brewing devices and MQTT for Home Assistant and other home automation platforms.

Getting Started

1. Go to Config and enter your MQTT broker address and port.
2. Enter your RAPT email and API Secret.
3. Set the Poll Interval (default 300s).
4. Click Save Configuration, then Start the bridge.
5. Devices appear in the sidebar as they are discovered.

MQTT Topics

TILT Hydrometer Integration

RAPT2MQTT displays live TILT data if it publishes to your MQTT broker on the TiltPi topic.

TiltPi + Custom MQTT Node

1. Open TiltPi Node-RED at http://tiltpi.local:1880
2. Find the ui_template node for your TILT color
3. Add a function node, then rbe, then mqtt out to topic TiltPi

Alternative: TiltBridge (ESP32)

Flash TiltBridge firmware onto an ESP32 for native MQTT output.

Brew Reminders & Notifications

Set reminders on active brews (e.g. "Dry hop on day 5"). When triggered, a notification is published to homeassistant_notifications with your configured target device. Set up the HA automation above to route these to your phone.

Links